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Amazon EC2 Auto Scaling now backfills Predictive Scaling forecasts so you can quickly validate forecast accuracy

Starting today, when you create a new predictive scaling policy, Amazon EC2 Auto Scaling goes back 14 days to generate capacity forecasts for the past dates, enabling you to see how predictive scaling would have scaled your Auto Scaling group. This allows you to quickly decide if the predictive scaling policy is accurate for your applications by comparing the demand and capacity forecasts against the actuals immediately after you create a predictive scaling policy. Previously, you would have had to wait at least a few days after creating the policy to build up sufficient forecast history for the same comparison to determine the forecast accuracy.

Source:: Amazon AWS